Do you have a screen protector installed?
I can see vertical lines (3), but are you not concerned about the horizontal lines that cross near the center of your screen?
Seems to split the screen in quarters, with other pairs of marks near the center of each guarter?
Did it look like that on first day?
Looks like slight rubbing, which may eventually damage the screen.
Or, maybe it's just the store lighting. Take to a wireless store somewhere (just for a second opinion 😀 )